blob: 078adfe9de290797d77f06dfa3d7bb67d383afa7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkStrikeCache_DEFINED
#define SkStrikeCache_DEFINED
#include "SkDescriptor.h"
#include "SkSpinlock.h"
#include "SkTemplates.h"
#include "SkArenaAlloc.h"
class SkGlyphCache;
class SkTraceMemoryDump;
#ifndef SK_DEFAULT_FONT_CACHE_COUNT_LIMIT
#define SK_DEFAULT_FONT_CACHE_COUNT_LIMIT 2048
#endif
#ifndef SK_DEFAULT_FONT_CACHE_LIMIT
#define SK_DEFAULT_FONT_CACHE_LIMIT (2 * 1024 * 1024)
#endif
#ifndef SK_DEFAULT_FONT_CACHE_POINT_SIZE_LIMIT
#define SK_DEFAULT_FONT_CACHE_POINT_SIZE_LIMIT 256
#endif
///////////////////////////////////////////////////////////////////////////////
class SkGlyphCache;
class SkStrikeCache {
public:
SkStrikeCache() = default;
~SkStrikeCache();
static void AttachCache(SkGlyphCache* cache);
using ExclusiveStrikePtr =
std::unique_ptr<
SkGlyphCache,
SkFunctionWrapper<void, SkGlyphCache, SkStrikeCache::AttachCache>>;
static ExclusiveStrikePtr FindStrikeExclusive(const SkDescriptor&);
static std::unique_ptr<SkScalerContext> CreateScalerContext(
const SkDescriptor&, const SkScalerContextEffects&, const SkTypeface&);
static ExclusiveStrikePtr CreateStrikeExclusive(
const SkDescriptor& desc,
std::unique_ptr<SkScalerContext> scaler,
SkPaint::FontMetrics* maybeMetrics = nullptr);
static void PurgeAll();
static void Dump();
// Dump memory usage statistics of all the attaches caches in the process using the
// SkTraceMemoryDump interface.
static void DumpMemoryStatistics(SkTraceMemoryDump* dump);
// call when a glyphcache is available for caching (i.e. not in use)
void attachCache(SkGlyphCache *cache);
ExclusiveStrikePtr findStrikeExclusive(const SkDescriptor&);
void purgeAll(); // does not change budget
int getCacheCountLimit() const;
int setCacheCountLimit(int limit);
int getCacheCountUsed() const;
size_t getCacheSizeLimit() const;
size_t setCacheSizeLimit(size_t limit);
size_t getTotalMemoryUsed() const;
int getCachePointSizeLimit() const;
int setCachePointSizeLimit(int limit);
#ifdef SK_DEBUG
void validate() const;
#else
void validate() const {}
#endif
private:
friend class SkGlyphCache;
struct Node {
Node(const SkDescriptor& desc) : fDesc{desc} {}
const SkDescriptor& getDescriptor() const {return *fDesc.getDesc(); }
SkGlyphCache* fNext{nullptr};
SkGlyphCache* fPrev{nullptr};
SkAutoDescriptor fDesc;
};
// The following methods can only be called when mutex is already held.
SkGlyphCache* internalGetHead() const { return fHead; }
SkGlyphCache* internalGetTail() const;
void internalDetachCache(SkGlyphCache*);
void internalAttachCacheToHead(SkGlyphCache*);
// Checkout budgets, modulated by the specified min-bytes-needed-to-purge,
// and attempt to purge caches to match.
// Returns number of bytes freed.
size_t internalPurge(size_t minBytesNeeded = 0);
void forEachStrike(std::function<void(const SkGlyphCache&)> visitor) const;
mutable SkSpinlock fLock;
SkGlyphCache* fHead{nullptr};
size_t fTotalMemoryUsed{0};
size_t fCacheSizeLimit{SK_DEFAULT_FONT_CACHE_LIMIT};
int32_t fCacheCountLimit{SK_DEFAULT_FONT_CACHE_COUNT_LIMIT};
int32_t fCacheCount{0};
int32_t fPointSizeLimit{SK_DEFAULT_FONT_CACHE_POINT_SIZE_LIMIT};
};
using SkExclusiveStrikePtr = SkStrikeCache::ExclusiveStrikePtr;
#endif // SkStrikeCache_DEFINED
|
